Both had regressed back to the pre-2026-06-28-incident state: GPU_FLAGS used
--enable-gpu-rasterization on any node with a GPU, and CPUQuota was 75%.
On archy-x250-exp (Intel HD 5500 under X11) this spins a dedicated GPU
process at 55-92% CPU (falls back to software compositing anyway), and the
75% cgroup quota throttled the kiosk unit ~81% of the time (nr_throttled
4856/6005) — the exact CPU-starvation signature documented as the choppy-
audio root cause. Restores the validated fix: --in-process-gpu,
--num-raster-threads=1, GpuRasterization disabled via --disable-features,
CPUQuota=200%. Verified on archy-x250-exp: no separate gpu-process, throttling
dropped to ~3% (nr_throttled 14/503).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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